how come Photons are deemed to be mass less when the equation for its energy contains mass=E= Mass x C^2?
- skeptikLv 73 months agoFavorite Answer
Where did you get the idea that equation says something with energy must also have mass?
- CarolOklaLv 73 months ago
Wrong equation. E = hv where
h = Planck constant, which really is "constant"
v = frequency, NOT velocity.
The speed of light IS NOT "CONSTANT"!!!!!
- 3 months ago
E = mc^2 only applies to an object at rest. Photons are never at rest. The full equation is
E^2 = (mc^2)^2 + (pc)^2
The energy of a photon is also given by E = hf where f is its frequency and h is planks constant.
- Anonymous3 months ago
E= Mass x C^2 is only for stationary objects.
E^2 = (Mass x C^2)2 + (Momentum x C)^2
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- SlumlordLv 73 months ago
They are energy, this equations tell you what their mass would be if they wre converted to mass.